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2020+ Silverado HD & Sierra HD Troubleshooting

A central location to report any issues or asking for help troubleshooting any problems with your 2020 Chevrolet Silverado 2500 / 3500 or 2020 GMC Sierra 2500 / 3500. Also recall announcements and Technical Service Bulletins (TSB).

406 topics in this forum

  1. 2020 6.6 Liter Gas Engine Problems

    By Bill Shaffer,   
    • 6 replies
    • 15.8k views

  3. Radio Software Version V158 Update

    By RugbyRef,
    • 11 replies
    • 2k views

  4. Service brake system

    By Kyle Prater,
    • 1 reply
    • 82 views

  5. 2020 2500hd high country door latch noisy 1 2

    By Paul jackckson,
    • 16 replies
    • 3.2k views

  6. loaded fixr uppr in Vancouver $33k

    By pokismoki,
    • 0 replies
    • 144 views

  7. Leaking rear window, new TSB?

    By kylant,
    • 2 replies
    • 935 views

  8. Check Trailer Brake connection

    By Jonathan Yusubov,
    • 2 replies
    • 160 views

  9. HVAC issues on a 2021 3500hd lt

    By Behind Bars,
    • 14 replies
    • 906 views

  10. Engine light error code: P11D5

    By Michael621,
    • 4 replies
    • 352 views

  11. 2020 GMC AT4 - Won't start, won't even attempt to turn over 1 2

    By CO 2020 GMC AT4,
    • 29 replies
    • 24.8k views

  12. Service trailer brake 2021

    By Mrdingdong,
    • 1 reply
    • 397 views

  13. 2020 Sierra 2500 Denali HD - DEF Tank/Wiring Failures

    By Cheryl Blair,
    • 0 replies
    • 156 views

  14. Infotainment Audio Issues 1 2

    By kf9yr,
    • 19 replies
    • 8.9k views

  15. Brake Controller:

    By Tucson Jack,
    • 9 replies
    • 789 views

  16. TPMS for trailer programmming

    By Mic_,
    • 4 replies
    • 261 views

  17. Tailgate spontaneously opening 1 2 3 4

    By jsward12,
    • 49 replies
    • 14.5k views

  18. Do I need to get the undercoat treated?

    By GMC4Zee,
    • 4 replies
    • 1.2k views

  19. Wheel lugnut torque

    By GMC4Zee,
    • 4 replies
    • 855 views

  20. 3.0 Duramax cranks but won’t start 1 2 3 4 33

    By Dbersuch,
    • 482 replies
    • 88.1k views

  21. Rear suspension noise after fluid film application

    By Chepachetchevyguy,
    • 7 replies
    • 4.4k views

  22. TPMS sensors loose signal right front wheel 2020 3500 HD DRW

    By Andrew Best,
    • 4 replies
    • 959 views

  23. active aero shutters 1 2 3 4

    By H1ghlndr,
    • 48 replies
    • 13.6k views

  24. 2020 2500hd program and add a key fob

    By Maninthesea,
    • 3 replies
    • 1k views

  25. Service keyless start system comes up when I start my vehicle

    By don penney,
    • 3 replies
    • 699 views

  26. Lower Convex Mirror Adjustment

    By jasschul,
    • 2 replies
    • 578 views


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